Linear Technology DC1485A Quick setup guide

1
dc1485afa
DEMO MANUAL DC1485A
Description
LTC2757
18-Bit, Parallel Input,
SoftSpan IOUT DAC
Demonstrationcircuit1485AfeaturestheLT C
®
2757Asingle
18-bitSoftSpan™IOUT DAC with±1LSB maximumINL.This
device features six programmable output ranges: 0V to 5V,
0V to 10V, ± 5V, ±10V, ±2.5V and –2.5V to 7.5V. The demo
circuit allows all of the LTC2757’s features to be exercised,
including system-level gain and offset adjustments.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
SoftSpan and QuikEval are trademarks of Linear Technology Corporation. All other trademarks
are the property of their respective owners.
Design files for this circuit board are available at
http://www.linear.com/demo
DAC
CONNECTIONS
ANALOG POWER SUPPLY
(NORMALLY ±15V)
RIBBON CABLE
TO DC590
CONTROLLER
Figure 1. Connection Diagram
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dc1485afa
DEMO MANUAL DC1485A
quick start proceDure
Connect a clean ±15V power supply to the turret posts at
the bottom of the DC1485A board. Connect J1 to a DC590
USB serial controller using the supplied 14-conductor rib-
bon cable. Connect DC590 to a host PC with a standard
USB A/B cable. Run the QuikEval™ evaluation software
which can be downloaded from www.linear.com/software.
The correct control panel will be loaded automatically. The
software automatically setsthe LTC2757 outputs according
to the entries in the control panel. A square wave option
is available to test settling time. MSPAN jumper should be
in the lower position if software span control is desired.
Additional software documentation may be available
from the Help menu item, as features may be added
periodically.
Downloaded from Arrow.com.Downloaded from Arrow.com.

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dc1485afa
DEMO MANUAL DC1485A
using the parallel connector
Protocol
The DC1485A can be used without the DC590 QuikEval
system. If a DC590 demo board is not connected the shift
registers on the DC1485A are disabled, allowing the user
to clock in data through the parallel connector (P1).
The data input register is loaded directly from the 18-bit
microprocessor bus (D0-D17 on the parallel connector)
by holding the D_/S pin low and then pulsing the WR_
pin low. The second register (DAC register) is loaded by
pulsing the UPD pin high, which copies the data held in
the input register into the DAC register. Note that updates
always include both data and span; but the DAC register
values will not change unless the input register values
have been changed by writing.
Loading the span input register isaccomplished ina similar
manner, by holding the D_/S pin high and then bringing
the WR_ pin low. The span and data register structures
are the same except for the number of parallel bits. The
span registers have three bits, while the data registers
have 18 bits.
Please see the LTC2757 data sheet for in depth timing
diagrams and more information about the communica-
tion protocol.
Parallel Pin Descriptions
D0-D17: DAC Input/Output Data Bits. These I/O pins set
and read back the DAC code. D17 is the MSB. D0 is the
LSB.
S0-S2: Span Input/Output. Pins S0, S1 and S2 are used to
program and to read back the output range of the DAC.
D_/S: Data/Span Select: This pin is used to select acti-
vation of the data or span I/O pins (D0 to D17 or S0 to
S2, respectively), along with their respective dedicated
registers, for write or read operations. Update operations
ignore D_/S, since all updates affect both data and span
registers. For single-span operation, tie D_/S to GND.
READ: Read Pin. When READ is asserted high, the data
I/O pins (D0-D17) or span I/O pins (S0-S2) output the
contentsof the selected register
. For single-span operation,
readback of the span I/O pins is disabled.
UPD: Update and Buffer Select Pin. When READ is held low
and UPD isassertedhigh,thecontentsof the input registers
(both data and span) are copied into their respective DAC
registers. The output of the DAC is updated, reflecting the
new DAC register values. When READ is held high, the
update function is disabled and the UPD pin functions as
a buffer selector—logic low to select the input register,
high for the DAC register.
WR_: Active Low Write Pin. A Write operation copies
the data present on the data or span I/O pins (D0-D17 or
S0-S2, respectively) into the input register. When READ
is high, the Write function is disabled.
MSPAN: Manual Span Control Pin. MSPAN is used to
configure the LTC2757 for operation in a single, fixed
output range.
G: Ground Pin. (Note, if an IDE cable is used, Pin 21 is
often keyed on the connector and may be trimmed.)
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dc1485afa
DEMO MANUAL DC1485A
harDware setup
Jumpers
MSPAN: Manual Span Control Pin. MSPAN is used to
configure the LTC2757 for operation in a single, fixed
output range. If MSPAN is high it will be configured for
single-span use. If MSPAN is low it will be set through the
QuikEval Software. Default position is 0 (low).
S0, S1, S2: Used to set the fixed output range if MSPAN
is high. Default position is 0, 0, 0 (0V to 5V).
S2 S1 S0 SPAN
0 0 0 0V to 5V
0 0 1 0V to 10V
0 1 0 ±5V
0 1 1 ±10V
1 0 0 ±2.5 V
1 0 1 –2.5V to 7.5V
REFADJ: Gain Adjust Pin. If no adjustments are required,
select GND. Selecting EXT connects the pin to the turret
allowing external adjustment to null gain error or com-
pensate for reference errors.
RVOS: Offset adjustment for DAC. If no offset adjustment
is required, select GND. Selecting EXT connects the offset
pin to the turret allowing external adjustment of offset.
VCC:Select source for 5V VCC supply. Set to 5V for supply
by onboard LT1236 reference (recommended). Set to REG
to be supplied by regulated supply from DC590 Controller
and remove the jumper to supply externally.
Analog Connections (Turret Posts)
VOUT: DAC Voltage Output.
VREF:DAC Reference Voltage. If the onboardLT1236 refer-
ences are selected, the voltage may be measured at these
points. If a remote reference is selected, then an external
reference must be applied to these points.
RVOS: DAC Offset Adjust Input. Use only if RVOS jumper
is set to EXT. Nominal input range is ±5V.
REFADJ: Gain Adjust Pin. This voltage-control pin can be
used to null gain error or to compensate for reference er-
rors. The gain error change expressed in LSB is the same
for any output range.
Power and Ground Connections
Analog Power: The 15V
, –15V and GND turret posts are
the analog supplies for the internal DAC amplifiers. These
should be connected to a well regulated, low noise power
supply.
VCC:Connection to VCC. See schematic and description
for VCC jumper.
Grounding: Separate power and signal grounds are pro-
vided. Signal GND is the turret closest to VOUT
, use this
for measurement ground and output return. Power GND
is between AMP V+and AMP V–turrets.
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.

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dc1485afa
DEMO MANUAL DC1485A
parts list
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURE/PART NUMBER KIT QTY
NUMBER OF BOARDS = 175
1 16 C1-C4, C6-C8, C10-C12, C19, C25,
C29, C31, C33, C40
CAP., X5R, 0.1µF 25V 20%, 0402 TDK, C1005X5R1E104M 2800
2 2 C5, C20 CAP., NP0, 100pF 50V, 5%,1206 AVX, 12065A101JAT2A 350
3 1 C9 CAP., X7R, 1µF 25V 10%, 0805 TDK, C2012X7R1E105K 175
4 2 C34, C37 CAP., X5R, 1µF 25V 20%, 0603 TDK, C1608X5R1E105M 350
5 6 C13, C18, C30, C36, C39, C41 CAP., X5R, 10µF 25V 20%,1206 TDK, C3216X5R1E106M 1050
6 1 C14 CAP., X7R, 1µF 25V 10%,1206 AVX, 12063C105KAT2A 175
7 0 C15, C16 CAP., 0603 OPT 0
8 0 C21 CAP., 1206 OPT 0
9 3 C17, C23, C28 CAP., NP0, 100pF 50V, 5%,0402 AVX, 04025A101JAT2A 525
10 2 C38, C35 CAP., X7R, 0.01µF 25V 20%,0402 TDK, C1005X7R1E103M 350
11 3 D1, D2, D5 DIODE, SCHOTTKY, SOT23 DIODES INC., BAT54C-7-F 525
12 9 E1, E2, E3, E4, E5, E6, E7, E8, E9 TEST POINT, TURRET, 0.064" MILL-MAX, 2308-2-00-80-00-00-07-0 1575
13 3 JP1, JP2, JP3 JMP, 2X3, 0.079" SAMTEC, TMM-103-02-L-D 525
14 2 JP4, JP5 JMP, 1X3, 0.079" SAMTEC, TMM-103-02-L-S 350
15 1 J1 HEADER, 2X7 PIN, 0.079CC MOLEX, 87831-1420 175
16 0 J2 CONN, BNC, RTANG 50Ω OPT (TYCO ELEC. AMP, 413631-1) 0
17 1 P1 JMP, 2X20, 0.100" SAMTEC, TSW-120-07-L-D 175
18 2 R1, R2 RES., Chip 10k 1/16W 5%, 0603 VISHAY, CRCW060310K0JNEA 350
19 3 R7, R8, R3 RES., Chip 1k 1/16W 5%, 0603 VISHAY, CRCW06031K00JNEA 525
20 6 R4, R9, R20, R21, R22, R23 RES., Chip 100Ω 1/16W 5%, 0402 VISHAY, CRCW0402100RJNED 1050
21 1 R5 RES., Chip 10Ω 1/16W 5%, 0603 VISHAY, CRCW060310R0JNEA 175
22 1 R6 RES., Chip 4.02k 1/16W 1%, 0603 VISHAY, CRCW06024K02FKED 175
23 8 R11, R16, R17, R18, R19, R27, R29,
R30
RES., Chip 4.99k 1/16W 1%, 0402 VISHAY, CRCW04024K99FKED 1400
24 4 R24, R25 ,R26, R31 RES., Chip 10k 1/16W 5%,0402 VISHAY, CRCW040210K0JNED 700
25 1 R28 RES., Chip 20k 1/16W 5%,0402 VISHAY, CRCW040220K0JNED 175
26 1 U1 I.C., LTC2757ACLX, LQFP48LX LINEAR TECH., LTC2757ACLX 175
27 1 U2 I.C., LT1012ACS8, SO8 LINEAR TECH., LT1012ACS8 175
28 1 U3 I.C., LTC2054HVCS5, SOT23-5 LINEAR TECH., LTC2054HVCS5 175
29 1 U4 I.C., LTC6240HVCS5, SOT23-5 LINEAR TECH., LTC6240HVCS5 175
30 1 U5 I.C., LT1360CS8, SO8 LINEAR TECH., LT1360CS8 175
31 0 U6 I.C., LTC6655AHMS8-5, MSOP8 OPT 0
32 1 U8 I.C., LT1236ACS8-5, SO8 LINEAR TECH., LT1236ACS8-5 175
32 4 U9, U10, U11, U12 I.C., 74VHC595MTC, TSSOP16 FAIRCHILD SEMI., 74VHC595MTCX 700
33 1 U13 I.C., NC7SZ14P5X, SC70-5 FAIRCHILD SEMI., NC7SZ14P5X 175
34 1 U14 I.C., Serial EEPROM, TSSOP8 MICROCHIP, 24LC025-I/ST 175
35 1 U15 I.C., LT1761ES5-5, SOT23-5 LINEAR TECH., LT1761ES5-5 175
36 1 U16 I.C., LT1964ES5-5, SOT23-5 LINEAR TECH., LT1964ES5-5 175
37 8 SHUNTS AS SHOWN ON ASSY DWG SHUNT, 0.079" CENTER SAMTEC, 2SN-BK-G 1400
38 4 MTG STAND-OFF, NYLON (SNAP ON), 0.50" TALL KEYSTONE, 8833 (SNAP ON) 700
39 2 STENCILS BOTH SIDES DC1485A-1 2
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.

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dc1485afa
DEMO MANUAL DC1485A
schematic Diagram
5 5
4 4
3 3
2 2
1 1
D D C C B B A A
5V
NOTES: UNLESS OTHERWISE SPECIFIED
REF REG
PARALLEL INTERFACE
1. ALL RESISTORS ARE IN OHMS, 0402. ALL CAPACITORS ARE IN MICROFARADS, 0402. 2. INSTALL SHUNTS ON JUMPERS AS SHOWN.
EXT
1
0
00
S0
0
1
1
1
1
0
0 10
-2.5 7.5
0
0 -5 5
1
MANUAL SPAN CONTROL
-2.5 2.5
0
0
0
1
-10 10
0
0 5
0 1
S1S2
0 1
SPAN
VREF
READ D1 D11 D15 D13
D10
G
D17
D17 D4 D8
D6
D3 D14
S0
MSPAN
D8
D12
CLR_
D14
VREF
VOUT
D5
D12
D6
UPD
D13
CLR_
WR_
D2
READ
MSPAN
D7
D16
D7
D0 D1 D15 D11
G
D0 D2 D10
D9
D_/S S2
D4
D16
S1 D9
UPD D_/S WR_
S0
D3
D5
S1
S1 MSPANS0
G G
S2
S2
G G G G
V+
V+
5V
V+
+5V
V-
V-
VCC
+5V
5V
+5V
VCC
V-
V+
VCC
-5V
VCC
V+
V-
VCC
-5V -5V
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
DEMO CIRCUIT 1485A
02/13/2014, 11:18 AM 1 1
KT
LEO C.
18-BIT PARALLEL INPUT, CURRENT OUTPUT DAC WITH READBACK
N/A LTC2757CLX
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
DEMO CIRCUIT 1485A
02/13/2014, 11:18 AM 1 1
KT
LEO C.
18-BIT PARALLEL INPUT, CURRENT OUTPUT DAC WITH READBACK
N/A LTC2757CLX
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
DEMO CIRCUIT 1485A
02/13/2014, 11:18 AM 1 1
KT
LEO C.
18-BIT PARALLEL INPUT, CURRENT OUTPUT DAC WITH READBACK
N/A LTC2757CLX
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
LEO C.
PRODUCTION
__ 202-13-14
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
LEO C.
PRODUCTION
__ 202-13-14
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
LEO C.
PRODUCTION
__ 202-13-14
R23 100R23 100
U12
74VHC595MTC
U12
74VHC595MTC
SCLR
10
GND
8
SER
14
SCK
11
RCK
12
VCC
16
G
13
QA 15 QB 1 QC 2 QD 3
QE 4
QF 5
QG 6
QH 7
Q'H 9
R2
10K
0603
R2
10K
0603
U9
74VHC595MTC
U9
74VHC595MTC
SCLR
10
GND
8
SER
14
SCK
11
RCK
12
VCC
16
G
13
QA 15 QB 1 QC 2 QD 3
QE 4
QF 5
QG 6
QH 7
Q'H 9
C1
0.1uF
C1
0.1uF
C9
1uF
0805 C9
1uF
0805
R7 1K 0603 R7 1K 0603
R25 10K R25 10K
R28 20K R28 20K
E9
RVOS
E9
RVOS
C29 0.1uF C29 0.1uF
E6 VREF E6 VREF
JP3
HD2X3-079
JP3
HD2X3-079
1 3 5 6
4 2
P1
HD2X20-100
P1
HD2X20-100
7
12
21
3 5 11 9
6 4
10
8
13 15 14
16
17 19 21 23 25 27 29 31 33 35 37 39
18 20 22 24 26 28 30 32 34 36 38 40
U11
74VHC595MTC
U11
74VHC595MTC
SCLR
10
GND
8
SER
14
SCK
11
RCK
12
VCC
16
G
13
QA 15 QB 1 QC 2 QD 3
QE 4
QF 5
QG 6
QH 7
Q'H 9
R17
4.99K
R17
4.99K
JP1
HD2X3-079
JP1
HD2X3-079
1 3 56
4 2
R30
4.99K
R30
4.99K
C25 0.1uF C25 0.1uF
C37 1uF
0603
25V C37 1uF
0603
25V
C17 100pF C17 100pF
E2 GND E2 GND
C31
0.1uF
C31
0.1uF
C33 0.1uF C33 0.1uF
C12
0.1uF
C12
0.1uF
R24 10K R24 10K
J2
OPT
J2
OPT
C15
0603OPT
C15
0603OPT
+ -
U2
LT1012ACS8
+ -
U2
LT1012ACS8
2 36
74
R8 1K 0603 R8 1K 0603
C14 1uF
1206
C14 1uF
1206
R9
100
R9
100
D2
BAT54C
D2
BAT54C
1 3
2
C21
1206
OPT
C21
1206
OPT
C4
0.1uF
C4
0.1uF
R16
4.99K
R16
4.99K
U14
24LC025-I /ST
U14
24LC025-I /ST
SDA 5 VCC 8
A0
1
A1
2
A2
3
VSS
4
WP 7
SCL 6
U10
74VHC595MTC
U10
74VHC595MTC
SCLR
10
GND
8
SER
14
SCK
11
RCK
12
VCC
16
G
13
QA 15 QB 1 QC 2 QD 3
QE 4
QF 5
QG 6
QH 7
Q'H 9
R27 4.99K R27 4.99K
C23 100pF C23 100pF
R5 10 0603 R5 10 0603
C38 0.01uF C38 0.01uF
U15 LT1761ES5-5 U15 LT1761ES5-5
BYP 4
OUT 5
VIN
1
GND
2
SHDN
3
C19 0.1uF C19 0.1uF
U16 LT1964ES5-5 U16 LT1964ES5-5
SHDN 4
OUT 5
GND
1
IN
2
BYP
3
R29
4.99K
R29
4.99K
C40 0.1uF C40 0.1uF
C18 10uF,25V 1206 C18 10uF,25V 1206
R26 10K R26 10K
JP4
EXT
GND
JP4
EXT
GND
1 3 2
C8 0.1uF C8 0.1uF
CS/CS/
E4
GND
E4
GND
E1 VOUT E1 VOUT
SDISDI
JP5
EXT
GND
JP5
EXT
GND
1 3 2
U6 LTC6655AHMS8-5 U6 LTC6655AHMS8-5
SHDN
1
VIN
2
GND
3
GND
4GND 5
VOUT_S 6
VOUT_F 7
GND 8
C10
0.1uF
C10
0.1uF
SDOSDO
R21 100R21 100
C13
10uF,25V
1206 C13
10uF,25V
1206
C35
0.01uF
C35
0.01uF
CLKCLK
D5
BAT54C
D5
BAT54C
1 3 2
JP2
HD2X3-079
JP2
HD2X3-079
1 3 56
4 2
E7 VCC E7 VCC
U8
LT1236ACS8-5
U8
LT1236ACS8-5
NC
1
VIN
2
NC
3
GND
4TRIM 5
VOUT 6
NC 7 NC 8
R31 10K R31 10K R22 100R22 100
R3
1K
0603
R3
1K
0603
C39 10uF,25V 1206 C39 10uF,25V 1206
R19 4.99KR19 4.99K
C3
0.1uF
C3
0.1uF
D1
BAT54C
D1
BAT54C
1 3
2
+ -
U4
LTC6240HVCS5
+ -
U4
LTC6240HVCS5
3 41
52
C34 1uF 0603 25V C34 1uF 0603 25V
E8
REFADJ
E8
REFADJ
R18
4.99K
R18
4.99K
C2 0.1uF C2 0.1uF
U13
NC7SZ14P5X
U13
NC7SZ14P5X
2 4
53
R1 10K 0603 R1 10K 0603
+ -
U5
LT1360CS8
+ -
U5
LT1360CS8
2 36
74
R11
4.99K
R11
4.99K
C5 100pF 1206 C5 100pF 1206
C11
0.1uF
C11
0.1uF
J1
HD2X7-079-MOLEX
J1
HD2X7-079-MOLEX
MOSI/SDA 7
EESDA 9
V+ 1
5V 2
CS 6
SCK/SCL 4
EEVCC 10
MISO 5
EESCL 11
EEGND 12
AUX 14
GND
3
GND
13
GND
8
C30
10uF,25V
1206 C30
10uF,25V
1206
E3
AMP V+
E3
AMP V+
C20 100pF 1206 C20 100pF 1206
E5
AMP V-
E5
AMP V-
C7
0.1uF
C7
0.1uF
C28 100pF C28 100pF
U1
LTC2757CLX
U1
LTC2757CLX
D13
12
D12
13
D11
14
D15
10
D14
11
RVOS 39
VDD 17
D10
15
D9
16
D8
23
D7
24
D_/S
33
READ
34
WR_
36 UPD
35
RINS 1
D6
25
D5
26
D4
27
D3
28
D2
29
D1
30
D0
31
S2
3
S1
38
S0
37
IOUT2F 6
IOUT1 40
RINF 2
MSPAN
21
GND
18
GND
19
REFADJ 48
RCOM 47
REFF 46
REFS 45
ROFSF 43
ROFSS 44
RFBS 42
RFBF 41
IOUT2S 5
GND/IOUT3 4
CLR_
20
GND
7
NC
22
NC
32
D16
9D17 8
C41 10uF,25V 1206 C41 10uF,25V 1206
R4
100
R4
100
C36
10uF,25V
1206
C36
10uF,25V
1206
R6
4.02K
0603
R6
4.02K
0603
C6
0.1uF
C6
0.1uF
R20
100
R20
100
C16 0603 OPT C16 0603 OPT
+ -
U3
LTC2054HVCS5
+ -
U3
LTC2054HVCS5
3 41
52
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DEMO MANUAL DC1485A
assembly Drawings
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DEMO MANUAL DC1485A
assembly Drawings
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DEMO MANUAL DC1485A
pcb layout anD Film
Top Silkscreen Top Solder Paste
Top Solder Mask
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DEMO MANUAL DC1485A
pcb layout anD Film
Layer 1-Top Layer Layer 2-GND Plane 1
Layer 3- GND Plane 2 + PWR Traces
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DEMO MANUAL DC1485A
pcb layout anD Film
Layer 4-Bottom Layer
Bottom Solder Mask
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DEMO MANUAL DC1485A
pcb layout anD Film
Bottom Solder Paste
Bottom Silkscreen
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DEMO MANUAL DC1485A
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, noresponsibility is assumed for its use. Linear Technology Corporation makes no representation
that the interconnection of its circuits as described herein will not infringe on existing patent rights.
pc Fab Drawing
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DEMO MANUAL DC1485A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ●FAX: [phone] ●www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2010
LT 0414 REV A • PRINTED IN USA
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:
This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT
OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete
in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety
measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union direc-
tive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.
If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date
of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU
OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS
FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR
ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims
arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all
appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or
agency certified (FCC, UL, CE, etc.).
No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance,
customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.
LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.
Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and
observe good laboratory practice standards. Common sense is encouraged.
This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC applica-
tion engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
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